Valve.



L. J. MILKE. VALVE.

APPLICATION FILED NOV. 10, 1908.

Patented May 18, 1909.

2 SHEETS-SEBBT 2.

23 i? moan Louis J; mLKnoF BALTIM RE, MARYLAND.

VALVE-"5 Specification o2 LetterQFateisxt.

' Patented M s-3'18, 1909.

. mums medflcvember no, .fletial an 461,947.

1 all wlwmtt p Be it known that I,LoUisJ.M1LKn,ac1t1-. non of the United States, residing at "Balti- "more city, State of Maryland,- have invented certain new and useful Improvements" in Valves, of which the tollowing is aspecification.

a My invention relates to an mprovement in valves, and more particularl to valves-of the character now about-to described,

wherein the valve, by reason of its construc tion, is automatically made toopen by the; fluid pressure flowing through it after thej controlling means-by which the valve is'made to close, is released, and is particularly i adapted to automatic control devices for% elevatois and-the like as referred to infthe accompanying drawin's, forming a part-of this specification, in w ich- Figure El is 'a the open or operative position.

longitudinal sectional view I of a valve constructed in accordance with the present invention, the same bem shown in ig.- 2, isa, similar view, with valve in the opposite" position to that shown'in Fig. 1.; Fig. 3, isi an elevation, partly l-H-SGCiBlQH, showing t hef valve applied. Fig. 1, is a modified form of valve, the same being shown imsection'al elevation. 4

In the drawing, A represents avalve body or casing, provided with end-caps 1 and 2, valve seats 3 and 4 are provided within the casing against which the valves 5- and 6 re-" s ectivelyare adapted to, become seated.-

ounted on a stem 7, one end of which projects through the end cap 2, said cap being,

provided with a stufiing 'box' 8, .slidably mounted on the end of the valve stem 7, is a sleeve 9 provided with a longitudinal slot 10,, a pin 11 is fixed to the stem 7 and.

projects through the slot 10, thereby limiting the movement of the, sleeve 9. Aspring 12 surrounds the stem and is int'erposedbetween the sleeve 9 anda collar 13 formed inte ml with or otherwise fixed to the stem. The sleeve, together with a spring just defor producing ositive seating of the valve when the s eeve is engaged by a door B ng 11 inlet pipe 14 is screw threaded to the'fitidy A and establishes communication from a source of fluid pressure (not shown) to a chamber 15 at one end of the valve body. A pipe 16, also screw threaded to thevalve body, connects a chamber 17, approximately midway of the valve ceedingfva lve, when the said valves are 4 body, withth'e chamber 15 on the next sucplaced in seriesfshould the particular valve under consideration I be the last in series, then the pipe 16 is connected to a cylinder C, said cy-lin er being provided with a piston 18 secured to a stem 19, the lower end of which is secured to the gate-of a valve 1) located on the-pi eline F, through which a fluid. pressure ows b which an elevator is operated, the valve serving to cut oil the flow as will be hereinafter explained. Above the piston 18, the stem projects through the head of the cylinder and has attachedthereto a weight 20, the purpose of w hioh will hereinafter appear.

"A pipe 21 is threaded to the valve casing door B has seated the valve 6 and asrabout to he '=closed -against the door casing Pressure will now *flow from. pipe 14:

through chamber 15 into chamber 17, thence through ipe 16 to the cylinder C, where it entersbe owfthe piston 18 and forces same u wardl enin the ate valve D. Pwhenyar dhor g I against the face of the valve 5 causes the valve to close and at the same time'the valve .6 .is opened, thereby relieving pressure from the .under side of the piston 18, the weight will cause piston to descend, thus closing the gate valveand backing the water through the pipe 16, chamber 17 and (3113111 ber 23 into the drain pipe 22 to dischar e. I

In Fig. 4 is shown the valve as used' %or a three-way valve in which case the pipe 22 is removed and a plug 24 is applied to the opening. A cap 25 provided with a bracket 26 is substituted. for the'cap 2. Pivotally secured.- to the end of the said bracket 26 is a lever 27, to the short end of which is piv-- and communicates with a pipe 22, also threaded to the valve body, through a chamber 23. r In a series of valves the pipe 22 on is opened, the pressure 7 tion, and hence I do .not wish to limit m self to the exactconstruction as herein set forth; butr Having fully described my invention, what I claim as new and desire to secure by Letters Patent, is:--

l. A" valve, comprising a casing, a valve stem; a pair of valves carried thereby,a sleeve slidably secured on the said valve stem, means limiting the movementof the sleeve, a collar provided on the said stem,a spring suri ounding the said stem and inter posed between the said sleeve and collar,

substantially as described.

2. A valve, comprising a casing having a plurality of inlet and exhaust ports provided therein, a reciprocating valve stem, a plurality of valves carried thereby, a chamber within the casing interposed between" the said valves, a plurality of valveseats formed Within the said casing, a sleeve slid ably secured on the said valve stem, means collar provided on the said valve stem, a

spring surrounding the said stem and interposed between the said sleeve and collar, substantially as described. I

4. A valve, comprising a casing-havinga plurality of chambers formed therein, an mlet pipe dischargin chambers, outlet plpes leading from p the other chambers, a reciprocating valve stem,

valves carried thereby, valveseats formed WVlthlIl the said casing, a sleeve shdably see cured on the said valve stem, means limit-,

into one of the said ing the movement of the said sleeve, a collar provided on the said valve ,stem, a spring surroundingthe said stem and interposed between the said sleeveand collar, substantially as described; 1 V r 5. A valve, comprising'a casing, having a plurality ofchambers formed therein, caps secured on each end of the said casing, a

stutling' box provided in one of'the said caps, a reciprocating valve stem secured" Within the casing, valves carried thereby, valveseats formed Within'the said casing, a sleeve slidably secured on the-saidstem ex terior of the said casingfmeans limiting the movement of the sleeve, a collar provided 011 the. said valve stem, a spring surround ing the said valve stem and interposed between the saidsleeve and collar, and means for reciprocating the said valve stem, thereby opening and closing the said'valves,

substantially as described.

In testimony whereof I afiix my signature:

in presence of two Witnesses v LOUIS J. MILKE.

Witnesses:

' E. lVAL'roN BREWI'N TON, V

Lxzzn S. BARRON. 

